Hepatic syndromes

Principles of syndrome classification

The symptomatology of liver lesions lacks strict nosological specificity. Similar symptom complexes can be detected in cirrhosis, acute and chronic hepatitis. Their main differences lie only in the degree of severity and persistence of manifestations. In the traditional Russian school of hepatology, all the variety of signs is usually divided into two major categories: clinical and laboratory-biochemical.

• The clinical group includes asthenic, dyspeptic, and pain syndromes, as well as hepatomegaly syndrome (liver enlargement), jaundice, and specific extrahepatic signs.
• The biochemical (laboratory) group includes the cytolysis syndrome, mesenchymal-inflammatory symptom complex, and minor liver failure syndrome.

A special place is occupied by cholestasis syndrome, which is diagnosed simultaneously by both clinical manifestations and shifts in laboratory tests.

Leading mechanisms of hepatobiliary system damage

The diagnosis of liver pathologies is based on separate laboratory and pathogenetic characterization of four basic syndromes, which often combine with each other in various proportions.

1. Cytolysis syndrome is caused by the destruction of hepatocytes. In the laboratory picture, it is vividly manifested by an increase in transaminase activity (ALT, AST). During the peak period of an acute process, their level can increase 5–15 times compared to the norm.
2. Cholestasis syndrome reflects disturbances in bile formation or bile outflow processes. It is diagnosed by an increase in bilirubin indices (predominantly due to its direct, conjugated fraction), as well as by an elevated level of the enzyme GGT.
3. Hepatocellular failure syndrome is associated with profound suppression of liver functions, primarily synthetic functions. A critical decrease in the content of albumin, prothrombin, and cholesterol is observed in the blood. In severe cases, it can be complicated by hepatic encephalopathy and hepatorenal syndrome.
4. Hemorrhagic syndrome develops as a direct consequence of coagulopathy resulting from the inability of the damaged liver to produce sufficient volumes of clotting proteins.

Dynamics of syndromes depending on the stage of the process

The clinical and laboratory picture directly depends on how well the organ's reserve capacities are preserved.

At the stage of compensated cirrhosis, standard laboratory parameters often remain within the physiological norm. In some cases, only a slight increase in cytolysis markers or initial signs of cholestasis is detected.

When the disease transitions to the decompensated stage, the picture changes dramatically:

• Hypersplenism syndrome becomes active, manifested by the suppression of hematopoietic cell lines: anemia, leukopenia, and thrombocytopenia develop.
• Mesenchymal-inflammatory syndrome appears, characterized by a significant increase in the $\gamma$-globulin fraction.
• Portal hypertension syndrome joins in.
• Phenomena of cholestasis and hepatocellular failure progress with a drop in protein fractions.

Evolution of manifestations in different periods of the disease

Acute liver pathologies are characterized by clear staging. For example, in the acute period (peak stage), massive cytolysis dominates with peak transaminase values and the development of pronounced hyperbilirubinemia.

The post-icteric period is marked by the regression of pathological processes. The clinical picture normalizes: the patient's well-being improves, and the sizes of the liver and spleen decrease to normal values. Simultaneously, a steady decrease in liver enzyme levels is noted in blood tests.

Class and exam questions

What else to study on this topic

• Pathogenesis of hepatic encephalopathy against the background of cellular failure
• Mechanisms of formation of hepatorenal syndrome
• Portal hypertension syndrome: hemodynamic disorders
• Extrahepatic signs and their pathophysiological basis

Other topics in the "Additional Topics" section

Prepared by WhiteCoat Pro faculty in accordance with the medical school curriculum. For educational purposes only.